doesn't know
La gente que vive en la ciudad no conoce los placeres de la vida en el campo.
People who live in the city don't know the pleasures of life in the country.
You don't know the facts.
La esposa de Tom no conoce al esposo de María.
Tom's wife doesn't know Maria's husband.
El deporte no conoce fronteras.
Sport knows no borders.
El que no conoce la historia está condenado a repetirla.
Those who do not know history are condemned to repeat it.
Tom no conoce al niño que está hablando con Mary.
Tom doesn't know the boy who is talking to Mary.